Re: [PATCH] drm/virtio: use virtio_max_dma_size
From: Christoph Hellwig <hch@infradead.org>
Date: 2019-08-10 08:22:00
On Thu, Aug 08, 2019 at 05:34:45PM +0200, Gerd Hoffmann wrote:
We must make sure our scatterlist segments are not too big, otherwise we might see swiotlb failures (happens with sev, also reproducable with swiotlb=force).
Btw, any chance I could also draft you to replace the remaining abuses of swiotlb_max_segment and swiotlb_nr_tbl in drm with proper dma level interface?